Mahabharata 12.194.19

वाचा तु यत्कर्म करोति किंचि;द्वाचैव सर्वं समुपाश्नुते तत्मनस्तु यत्कर्म करोति किंचि;न्मनःस्थ एवायमुपाश्नुते तत्

vācā tu yatkarma karoti kiṃci;dvācaiva sarvaṃ samupāśnute tatmanastu yatkarma karoti kiṃci;nmanaḥstha evāyamupāśnute tat

Our plain-language meaning of this verse is waiting for scholar review.